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Old 07-26-2003, 07:38 PM   #1
ImportVenom
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Default Pinging problems...what type of gas in Socal?

Hey all, my car is pinging and I tried switching gas and it still seems to do it. Will it go away after a while? I tried using Shell 91 and now it pings, then I put in Mobil and it still pinged. Now I have 76 and it seems to be better after resetting the ECU, but not sure what is going on. I just had the o2 sensor and MAS replaced. Could that be causing it? Or does it need to learn? What is the best brand of gas that no one has any troubles with? If this doesn't go away, does anyone have a DeltaDash to help me see if it really pinging or knocking badly? Thanks.
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Old 07-26-2003, 07:53 PM   #2
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Default Re: Pinging problems...what type of gas in Socal?

Quote:
Originally posted by ImportVenom
What is the best brand of gas that no one has any troubles with?
Good question - Have talked to a few people regarding this same issue... But they don't know what the hell they are talking about, so I still wonder. When the car was new, of course only 91 octane was used. Then I (in my infinite wisdom ) got cheap and put a tank of 87 octane like, ARCO gas in it. Jesus... The thing barely ran!! I actually ended up siphoning out that crap because I couldn't stand it anymore! Sure learned my lesson!! So I started putting Chevron 91 in (I forget what made me think that Chevron was superior... But I did) - Then I heard somewhere (have no idea the actual validity of it) that Chevron is currently up to their eyes in legal crap because they got caught selling 87 octane as 91 ... So THEN I switched to 76 (91 octane of course).. Which is what I currently use. I am just curious because I have been known to drive all over damn town because I had to find a certain station. Would really hate to know that I drove all over town to find a CRAPPY station!! heh
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Old 07-26-2003, 08:00 PM   #3
US2JDM
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These hot summer days won't help things either. You guys should either blend in a little 100 oc or add some tolulene.
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Old 07-26-2003, 08:07 PM   #4
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Yes, a common one indeed. I would check the STi forums. What I have heard solves the problem is going to a 76 station with 100 Octane Racing gas. Fill up and reset the ECU like you did. This is what some have said work but again double check it. For the nearest Racing gas station you can http://www.76.com but they do not have all stations listed (like the one around south OC). Do you have an STi? or just a WRX. Usually WRX's will not do that of the lot so you may want to check with the dealer if its doing that bone stock. Hope this helps!
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Old 07-26-2003, 08:11 PM   #5
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Quote:
Originally posted by US2JDM
These hot summer days won't help things either. You guys should either blend in a little 100 oc or add some tolulene.
yes yes yes
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Old 07-26-2003, 08:13 PM   #6
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and its toluene MILAN
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Old 07-26-2003, 08:14 PM   #7
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Quote:
Originally posted by mlambert
and its toluene MILAN
and it's Mulan, Manburt.
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Old 07-26-2003, 08:20 PM   #8
mlambert
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stop making fun of me it hurts my feelings and other things
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Old 07-26-2003, 08:22 PM   #9
WRX-pilot
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And as far as what kind of gas I use, I always use 76's 91 octane... nothing else

There was a thread on this not too long ago:

http://forums.nasioc.com/forums/show...hreadid=379790
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Old 07-26-2003, 08:28 PM   #10
ImportVenom
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Thanks for the input guys. I have a regular wrx, not an STi. If i just got a crappy tank of gas from shell, would the pinging go away right after I changed gas, or does it take a while? Hopefully it will go away.

BTW, maybe I will stick with 76. The dealer tech I talked to (who has been working on subies for almost 20 years and has a modded one of his own) doesn't like 76 or Mobil. He said Chevron is better, or USA gas (he said is the best but hard to find). Any additional input?
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Old 07-26-2003, 08:35 PM   #11
I am mattjk
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Default Re: Pinging problems...what type of gas in Socal?

Quote:
Originally posted by ImportVenom
Hey all, my car is pinging and I tried switching gas and it still seems to do it. Will it go away after a while? I tried using Shell 91 and now it pings, then I put in Mobil and it still pinged. Now I have 76 and it seems to be better after resetting the ECU, but not sure what is going on. I just had the o2 sensor and MAS replaced. Could that be causing it? Or does it need to learn? What is the best brand of gas that no one has any troubles with? If this doesn't go away, does anyone have a DeltaDash to help me see if it really pinging or knocking badly? Thanks.
Remove your CIA.

Chevron is about as bad as Arco.

I rate 76 the best, then Shell, and Mobil if I am desparate.
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Old 07-26-2003, 08:42 PM   #12
WRX-pilot
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Well one thing about Chevron is they are Notorious to... whoops wrong octane like Neaners mentioned above. I believe another member was running their gas on a different type of car, something went wrong on the engine and the test results came back as 89 octane. Again another rumor but that is what has been going around.
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Old 07-26-2003, 08:44 PM   #13
I am mattjk
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Quote:
Originally posted by WRX-pilot
Well one thing about Chevron is they are Notorious to... whoops wrong octane like Neaners mentioned above. I believe another member was running their gas on a different type of car, something went wrong on the engine and the test results came back as 89 octane. Again another rumor but that is what has been going around.
It's not rumor, it's FACT. I fried the valves on my 91 Supra turbo and had the Chevron gas analyzed. It was 89 octane.
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Old 07-26-2003, 08:44 PM   #14
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Quote:
Originally posted by mlambert
and its toluene MILAN
Sorry, MIKE...my spell check is non-existent.
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Old 07-26-2003, 08:57 PM   #15
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its ok just dont do it ever again
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Old 07-26-2003, 08:58 PM   #16
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Quote:
Originally posted by mlambert
its ok just dont do it ever again
It's ev4r, MIKE.
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Old 07-26-2003, 08:59 PM   #17
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not when im being serious
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Old 07-26-2003, 09:03 PM   #18
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Quote:
Originally posted by mlambert
not when im being serious
Like Yahoo Serious?


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Old 07-26-2003, 09:04 PM   #19
mlambert
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yes just like yahoo serious

www.scsot.com is taking me to yahoo, serious
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Old 07-26-2003, 09:05 PM   #20
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ok its fixed now but its still boring
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Old 07-26-2003, 09:20 PM   #21
Kwyjibo
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i talked to someone once who worked for cheveron 2 years ago. he told me the jist of his job was trying to figure out what shell puts in their gas casue it burns the best (or it did two years ago). since then i try and only use shell or 76. But i do live near a palce that sells 101 octane and i should start mixing some of that in.


in 14 galons of gas (which is how much it usually takes to fill my tank), how much 91 and 101 should one mix to get a 93+ rating??

is there some math for this?

btw, is anyone else getting bad gas milage?? I only get about 17-18...cobb stage 2.

thanks.
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Old 07-26-2003, 09:24 PM   #22
mlambert
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The shell around the corner from me has "92" on every pump, but I dont believe it really is.
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Old 07-26-2003, 09:27 PM   #23
I am mattjk
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Quote:
Originally posted by Kwyjibo
i talked to someone once who worked for cheveron 2 years ago. he told me the jist of his job was trying to figure out what shell puts in their gas casue it burns the best (or it did two years ago). since then i try and only use shell or 76. But i do live near a palce that sells 101 octane and i should start mixing some of that in.


in 14 galons of gas (which is how much it usually takes to fill my tank), how much 91 and 101 should one mix to get a 93+ rating??

is there some math for this?

btw, is anyone else getting bad gas milage?? I only get about 17-18...cobb stage 2.

thanks.
Basic algebra. Add the two and divide by the total quantity.

For example. 4 gallons of 91 plus 2 gallons of 101: 91 * 4 + 101 * 2 / 6 = 94.3 octane.
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Old 07-26-2003, 09:27 PM   #24
I am mattjk
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Quote:
Originally posted by mlambert
The shell around the corner from me has "92" on every pump, but I dont believe it really is.
If it has Chevron in fine print, it is fake.
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Old 07-26-2003, 09:29 PM   #25
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nah no chevron, next time you come over mattjk ill show you

we can have a mini meet
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